In films from 1913 as a Keystone Cop, and from 1916 as a director of several Mack Sennett "bathing beauties" shorts. In 1920 Cline co-directed "One Week" with Buster Keaton, and went on to work on several of Keaton's early gems, including "Cops" (1922) and "The Three Ages" (1923). Though Cline made numerous comedies over the next two decades, only his collaborations with W.C. Fields stand out.

In films from 1913 as a Keystone Cop, and from 1916 as a director of several Mack Sennett "bathing beauties" shorts. In 1920 Cline co-directed "One Week" with Buster Keaton, and went on to work on several of Keaton's early gems, including "Cops" (1922) and "The Three Ages" (1923). Though Cline made numerous comedies over the next two decades, only his collaborations with W.C. Fields stand out.